Still, you need to be selective when choosing which fish oil product to supplement with. Depending on the product, fish oil can range from 30%-70% active ingredients (EPA and DHA). The typical stuff you’ll find in your local supermarket is the cheap 30% stuff containing many more impurities and less active ingredients than higher-percentage products.

Your best bet is to go with a fish oil product with a purity level of at least 50%, meaning for every 1,000 mg capsule, the product should contain a combined 500 mg of EPA/DHA. For an even higher purity (70%), choose Neptune Health’s pharmaceutical-grade fish oil product, Omega 8060.